Malicious PDF — malware analysis report

Static analysis result for SHA-256 411196907b64992f…

MALICIOUS

PDF

123.4 KB Created: 2020-11-20 09:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 409926ede61545298e257647fc2a2250 SHA-1: 9d39f3977ea24a85dc4189ab4eaaf54d3a252682 SHA-256: 411196907b64992ff1abdb75079a163a4dc068414345a5c1c7c43eafeadfd934
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/aws?utm_term=ancient+aramaic+bible+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457320/normal_5fa234c531c55.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/jigeron-vanokamukere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8ea1784399b.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/9451f98e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f91fd0f84ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fa3300d1c58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fac31d766302.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/3ff3e7a32daae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8a28b8c9aa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xoduta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb8f1fe-1350-4cf3-8132-2027cbfaeb83/ejercicios_resueltos_de_logaritmos_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b52281-2fa6-4446-820c-90f1887e130d/14337020224.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001b2be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B2BE 25468 bytes
SHA-256: f260728cc95af2d2415c98ce130a7d632df3a479d05d99edbf3269d09fbfcc0a
font_00_sfnt_off00016d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D25 5252 bytes
SHA-256: 3c3f94274678703fa6c3819c1fea672f663de56a21ee0be8e226bd6cb22bdeae
font_01_sfnt_off00017eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EEC 16500 bytes
SHA-256: 7214fec91ee86a3ab67b16bca63e3ec5eca66a0025d46f0a5502ec6ada1c3ca5

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